Muffler.



'WERNER M. NORDGREN, 0F CHARLOTTENBURG, GERMANY, ASSIGNOKR TO GENERAL ELECTRIC COMPANY, A. CORPORATION 0F NEW YORK.

HEISSUED f Murmeln Specification of Letters Patent.

Patented' Feb. 5, 1918.

Application filed November 4, i915. 'Serial No. 59,541.

To all whom it may conern: i

Be it known that I, IVERNER M.` NonncnEN, a subject ot' the King of Sweden, residing' at Charlottenburg, Germany, have invented certain new and useful Improvements in Mulllers, of which the following is a speciment 8. They enter this at considerable ication.

This invention relates to devices 'for silent? ing the noise of the exhaust gases of an internal combustion engine or the like, and its object is to accomplish that result by a siinple and inexpensive contrivance.

In the accompanying drawing, Figure 'l is a longitudinal section of my improved mufiler, and Fig. 2 is a cross-section ot' the same on the line Q-2, Fig. l.

The hollow body 3 is preferably cylindri cal with an exit opening 4 in its upper end.

The entrance opening or inlet 5 for the eX- vhaust gases is located in one sideA of the body near its upper end. Inside the body is a partition 6 which divides the interior of the muffler into an entrance compartment 7 and an lexit compartment 8. vThe inlet 5 opens into the compartment 7, and the exit opening 4 leads out of the exit compa-re ment 8.

The partition 6 is rounded out opposite the inlet 5 forming a reception chamber ot considerable capacity, but it passes downwardly it gradually approaches the side of the body of the n'iui'tler and Finally lbecomes a Senn-cylindrical v'all concentric with and not tar from the side wall of said body. The edges of the partition are at all times united to the walls of the body, s0 that at the lower end of said partition, which is a little distance from the bottom 9 of 'the body, there is an outlet opening 10 of considerable length but of slight Width. As a. result of this construction, the cross-sectional area of the entrance compartment gradually decreases from the reception chamber to the outlet chamber S. The partitio'n G not only divides' the interior of the body into two chambers but it also forms in effect a nozzlel for increasing the velocity of the exhaust fluid. The operation is as follows: The exhaust gases of the engine enter intermittently at 5 into the comparatively roomy reception chamber and flow from there down throug'h the narrowing entrance comphrtment 7 through the restricted outlet 10 into the lower end ot' the much larger exit compartor substantially so and pass up and out through the exit openings. The *curved* shape oi the partition 6 guides the gases easily and without eddies to the compartment 8. The changes in direction, and the widening and thinning of the gas yStream as it flows toward the outlet 4t, all serveA to smooth out the successive impulses and quiet the popping noise of the exhaust.

In accordance with the provisions ot the patent statutes, I have described the principle of operation nl? my invention, together with the apparatus which I now consider to represent the best embodiment thereof;but I desire to have it understood that the apparatus shown is only illustrative, and that the invention can be carried out by other means. lVhat I claim 'as new and desire to secure by Letters Patent of the United States, is,--

A muiiler comprising a casing closed at ing in one side adjacent the end having the other end, said casing having an inlet oponing in one side adjacent the end having theA exit opening; and partition wall which extends f'roni a point between .said openings toward the closed end ot the casing, terminating short thereof, said partition being rounded out oppositethe inlet opening to form with the side wall ot the casing a pocket, and gradually approaching the side wall toward the closed end oi-` the casing and at the same time gradually widening out so as to form a long narrow outlet passage between. said-par` tition and the side wall. r

In Witness whereof, I have hereunto set my hand this 23d day of September, 1915.

VIRNER M. NRDGREN. Witnesses:

P. WAGNER, W. BELLMAN. 

